以异佛尔酮二异氰酸酯(IPDI)和三乙醇胺(TEOA)制备支化型异氰酸酯基(-NCO)封端的预聚体,分别以N-甲基二乙醇胺(MDEA)和聚乙二醇(PEG)为亲水扩链剂,最后用二甲基吡唑(DMP)封闭剩余的-NCO基团得到阳离子水性封闭型聚异氰酸酯交联剂,并用傅里叶变换红外光谱(FT-IR)表征了交联剂的结构.主要研究了预聚反应时异氰酸酯指数(R1值)以及亲水扩链剂的种类对交联剂性能的影响.研究表明:亲水扩链剂的种类对交联剂的解封温度有显著的影响,当以MDEA为亲水扩链剂、R1值为1.9时,交联剂的性能达到最佳.
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